How to get start & end points of the wall joint?

Hi All,

I want to get the start and end points of the wall joint, instead of the wall.

Despite the fact, that the code fetches each wall of the room and then gets the relevant curve, as shown below.

Wall w = r.Document.GetElement(bs.ElementId) as Wall;
      Curve curve = (w.Location as LocationCurve).Curve;

The following code returns the start and end points of the wall, not the wall joint.

curve.GetEndPoint(0)
curve.GetEndPoint(1)

Is there any workaround for this issue.

Any help will be highly appreciated.

Many Thanks and Kind Regards

Bilal